$\frac{sin^2\left(x\right)}{sin\left(x\right)+sin\left(x\right)\cos\left(x\right)}=2csc\left(x\right)$

$\frac{27}{7},\pi,\sqrt{14}\sqrt{16},27.4,\:\frac{65}{13}$

$2yx^4\:x\:3x^{-4}y^3$

$\frac{2}{5}ax+\frac{1}{2}ax+\frac{1}{10}ax+\frac{1}{20}ax$

$\frac { x ^ { 2 } - 8 x - 6 } { 3 ( x + 1 ) ( x ^ { 2 } + 5 ) }$

$-7+4^2$

$y'-4y=e^{5x}$